The royal Château de Chambord at Chambord, Loir-et-Cher, France, is one of the most recognizable châteaux in the world because of its very distinct French Renaissance architecture which blends traditional French medieval forms with classical Renaissance structures. The building, which was never completed, was constructed by King François I.
Chambord is the largest château in the Loire Valley ; it was built to serve as a hunting lodge for François I, who maintained his royal residences at Château de Blois and Château d'Amboise. The original design of the Château de Chambord is attributed, though with several doubts, to Domenico da Cortona. Some authors claim that the French Renaissance architect Philibert Delorme had a considerable role in the château's design, and others have suggested that Leonardo da Vinci may have designed it. The château features 440 rooms, 282 fireplaces, and 84 staircases. Four rectangular vaulted hallways on each floor form a cross-shape.
The roofscape of Chambord contrasts with the masses of its masonry and has often been compared with the skyline of a town: it shows eleven kinds of towers and three types of chimneys, without symmetry, framed at the corners by the massive towers. The design parallels are north Italian and Leonardesque. Writer Henry James remarked "the towers, cupolas, the gables, the lanterns, the chimneys, look more like the spires of a city than the salient points of a single building.
The château also features 128 meters of façade, more than 800 sculpted columns and an elaborately decorated roof. When François I commissioned the construction of Chambord, he wanted it to look like the skyline of Constantinople. (From Wikipedia)

Well, it doesn't remind me of Istanbul but I do not know how Istanbul looked like in sixteenth century. One can go on this terrace and admire all these chimneys. Look carefully - it may seem symmetrical but it is not.